Improvement in the manufacture of glass shades, globes



I. swam. MANUFACTURE OF GLASS- GLQBES, SHADES, &c.

No.189,180.' Patents d AurilS, 1877.

N. PETERS. PNOTO UTHOGRAPME E WASHINGTON. 6164 I UNITED STATES PATENT OEErcE- JOSEPH BOURNE, OF WEST MERIDEN, CONNECTICUT, ASSIGNOR TO THE MERIDEN FLINT GLASS COMPANY, OF SAME PLACE.

IMPROVEMENT IN THE MANUFACTURE OF GL ASS SHADES, GLOBES, 8co- Specification forming part of Letters Patent No. 189,180, dated April 3, 1877; application filed March 28, 1877.

To all whom it may concern:

Be it known that I, JOSEPH BOURNE, of West Meriden, in the county of New Haven and State of Connecticut, have invented a new Improvement in the Manufacture of Glass Globes, Shades, &c.; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification Figures 1, 2, 3, 4 illustrating the process, and Fig. 5 showing a side view of the article complete.

This invention relates to an improvement in the method orprocess of manufacturing combined shades and globes, or shades and chimneys, for illuminating purposes-that'is gathering of white glass, or glass of different color, and work the two together, thus making the colored portion of two thicknesses, the color running to substantially nothing at its edge. The result of this is, that for a considerable distance from the edge of the colored glass, the colored portion will be variable in thickness, and give a cloudy appearance, preventing the clearly-defined or separate and independent appearance of the two parts, and especially is this the case with opal-glass, so that in a globe and shade thus made, the edge of the opal portion fora considerable distance'above the dividing-line will be cloudy, owing to the unavoidable variableness of the thickness of the opal portion, as it runs from its thickest part above down to nothing, or nearly so, at the edge.

In another method the two parts have been successively formed and united at the time of finishing the second part. In this method it is difficult to produce a perfect and uniform 'oint. J This invention is designed to overcome these difficulties; and'it consists in first partially forming one portion, preferably the opal,

and, while still on the blow-pipe,'opening the lower end, and forming a smooth and clearlydefined edge thereon; then upon this edge dropping a sufficient quantity of the other part, as clear glass, which readily adheres thereto, and subsequently proceeding to finish the article as if of one kind of glass, as more fully hereinafter described.

' First, the requisite quantity of opalglass is usual manner of finishing such articles of glass, as seen in Fig. 4.

'Thus finishing the edge of the first portion makes a clearly-defined line around the globe or shade at the point of'connection, both in appearance and in construction, for the division is readily perceptible to thetouch; there will unavoidably be a ridge or unevenness at that point in vertical section, but the edge of A the flint portion will be as pure and even color as that portion above, and no part of the upper portion is of two thicknesses, as must be the casein the construction before referred to. While in practice the upper portion of the shade or chimney is first made, and then the -flint portion attached, as described, this may be reversed; but it is more 'difficult tosuccessfully work the glass.

I claim The improvement in the manufacture of combined globes and shades, and chimneys and shades, for illuminating purposes, consisting in forming upon the one part, as opal, before it is completely shaped, a finished edge, and uniting thereto sufficient glass for the second part, as flint, subsequently finishing the article as herein described, whereby a clearly-defined dividing-line between the opal and flint portions is produced, and without the overlaying of one part upon the other.

JOSEPH BOURNE.

Witnesses:

JAMES P. PLATT, W. W. LYMAN. 

